Greetings,
The TR4640 Is not a us-based product and is intended for sale in other regions. I found a support portal for Canon Europe.
https://www.canon-europe.com/support/consumer/products/printers/pixma/tr-series/pixma-tr4640.html?ty...
You can also visit Canon Global to find the support portal in the country where you reside.
~Rick
Bay Area - CA
~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8
~CarePaks Are Worth It
